EP0514360A2
Expired / Lapsed
EP
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A communication system for integrating a paging system with cellular radio telephones
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1992-04-15
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Granted: —
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Expires: 2012-04-15
Abstract
Abstract The present invention relates to a cellular mobile radio telephone system which incorporates an independent paging capability with an existing mobile telephone by taking advantage of call forwarding and redirecting features available on the telephone switching network. When a mobile telephone is set to an active or "on" mode, calls are directed to that mobile telephone using the cellular paging channel and conventional cellular paging procedures. However, when the mobile telephone is set to a sleep mode and the power is switched off, the mobile switching center automatically forwards calls to the mobile to an independent paging system which transmits the call as a paging signal to a small pager associated with the mobile telephone. When the pager receives a page signal as a result of the forwarded call, the pager transmits a low-power signal to the mobile telephone which switches on the power of the mobile telephone. A predetermined time after forwarding the call to the paging system, the mobile switching center redirects the forwarded calls using redirecting procedures to the mobile telephone. By the time the call is redirected, the mobile station has been activated and can now receive the call directly. Because the active pager consumes much less lower than the mobile telephone listening to a paging channel of the cellular system, setting the mobile telephone to the sleep mode results in considerably less battery drain. When the mobile is set to a page mode, the pager functions as a conventional paging device.
Inventors
- 👤 Walter Ghisler
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 16:25
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W68/00; H04W52/00; H04W52/02; H04W52/0209; H04W52/0212; H04W52/0216; H04W52/0219; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
74 words
A cellular communications system where mobile radio telephones communicate with a network switching center via a corresponding base station, comprising: a plurality of mobile radio telephones, each mobile telephone operating in one of multiple modes, and a plurality of pagers, each pager being associated with one of said plurality of mobile telephones including: means for activating said mobile telephone upon receipt of a page signal when said mobile telephone is in a first mode.
Claim 2
Dependent Claim
79 words
The system according to claim 1, wherein said network switching center includes: means for sensing a current mode of said one mobile telephone; means for forwarding an incoming call to said one mobile telephone to cause a paging signal to be generated when said sensing means senses that said one mobile telephone is in said first mode; and means for redirecting said forwarded call to said mobile telephone a predetermined time period after said incoming call has been forwarded.
Claim 3
Dependent Claim
20 words
The system according to claim 2, wherein said forwarded call results in a page signal being transmitted to said pager.
Claim 4
Dependent Claim
32 words
The system according to claim 2, wherein said means for redirecting includes means for generating a cellular paging signal to be transmitted over a control channel associated with said corresponding base station.
Claim 5
Dependent Claim
25 words
The system according to claim 2, wherein said network switching center includes means for registering incoming calls that do not result in a voice communication.
Claim 6
Dependent Claim
36 words
The system according to claim 1, wherein each of said pagers includes: a receiver for receiving said page signals, and a control means, connected to said receiver, for generating an activation signal in said first mode.
Claim 7
Dependent Claim
27 words
The system according to claim 1, wherein said pager includes: means for generating audible signals and visible signals upon receiving said page signal in said first mode.
Claim 8
Dependent Claim
18 words
The system according to claim 2, wherein said each mobile telephone is associated with a unique identification number.
Claim 9
Dependent Claim
31 words
The system according to claim 6, wherein said activation means includes: a transmitter, connected to said control means, for generating a low frequency energization signal in response to said activation signal.
Claim 10
Dependent Claim
41 words
The system according to claim 6, wherein said activation means includes means, connected to said control means, for generating audible tones, and said one mobile telephone includes means for detecting said audible tones and providing power to said one mobile telephone.
Claim 11
Dependent Claim
28 words
The system according to claim 9, wherein said one mobile telephone includes: means for detecting said low frequency energization signal and providing power to said one mobile telephone.
Claim 12
Dependent Claim
33 words
The system according to claim 11, wherein said mobile telephone includes: means for receiving in a second mode high frequency cellular paging signals over a control channel associated with said corresponding base station.
Claim 13
Dependent Claim
114 words
The system according to claim 12, wherein said one mobile telephone includes: mode selection means for allowing a subscriber to select one of said multiple modes, said multiple modes including: said first mode wherein said one mobile telephone is deactivated and said pager activates said one mobile telephone upon receipt of a page signal; a second mode wherein said one mobile telephone monitors cellular paging signals over said control channel assigned to said corresponding base station; a third mode wherein said one mobile telephone is deactivated and said pager generates an alert signal in response to said page signal; and a fourth mode wherein both said one mobile telephone and said pager are deactivated.
Claim 14
Dependent Claim
45 words
The system according to claim 11, wherein said first mode corresponds to a sleep mode and said third mode corresponds to a page mode where said one mobile telephone is deactivated and said pager is activated in both said page mode and said sleep mode.
Claim 15
Dependent Claim
16 words
The system according to claim 1, wherein said pager is portable and incorporated into a wristwatch.
Claim 16
Dependent Claim
19 words
The system according to claim 1, wherein said activation means is a radio transmitter for generating low frequency signals.
Claim 17
Dependent Claim
53 words
A mobile radio page phone for use in a cellular communications system, comprising: a mobile radio telephone operating in one of multiple modes, and a pager associated with said mobile telephone having means for activating said mobile telephone upon receipt of a page signal when said mobile telephone is in a first mode.
Claim 18
Dependent Claim
29 words
The page phone according to claim 17, further comprising: a power receptacle adapted to provide power to said mobile telephone when said mobile telephone is placed in said receptacle.
Claim 19
Dependent Claim
67 words
The page phone according to claim 18, wherein said mobile telephone further comprises: a contact switch having a first state when said mobile telephone is secured in said receptacle and a second state when said mobile telephone is removed from said receptacle, and a mode switch, connected to said contact switch, for selecting of one of said multiple modes based on the state of said contact switch.
Claim 20
Dependent Claim
45 words
The page phone according to claim 19, wherein when said contact switch is in said second state, said mode switch is set to said first mode and when said contact switch is in said first state, said mode switch is set to a second mode.
Claim 21
Dependent Claim
29 words
The page phone according to claim 17, wherein said pager includes a means for generating audible signals and visible signals upon receiving said page signal in said first mode.
Claim 22
Dependent Claim
32 words
The page phone according to claim 17, wherein said activation means includes: a transmitter, connected to said control means, for generating a low frequency energization signal in response to said activation signal.
Claim 23
Dependent Claim
27 words
The page phone according to claim 22, wherein said mobile telephone includes: means for detecting said low frequency energization signal and providing power to said mobile telephone.
Claim 24
Dependent Claim
28 words
The page phone according to claim 17, wherein said mobile telephone includes: means for receiving in a second mode high frequency cellular paging signals over a control channel.
Claim 25
Dependent Claim
102 words
The page phone according to claim 17, wherein said mobile telephone includes: mode selection means for allowing a subscriber to select one of multiple modes, said multiple modes including: said first mode wherein said mobile telephone is deactivated and said pager activates said mobile telephone upon receipt of a page signal; a second mode wherein said mobile telephone monitors cellular paging signals over said control channel; a third mode wherein said mobile telephone is deactivated and said pager generates an alert signal in response to said page signal; and a fourth mode wherein both said mobile telephone and said pager are deactivated.
Claim 26
Dependent Claim
46 words
The page phone according to claim 25, wherein said first mode corresponds to a sleep mode and said third mode corresponds to a page mode and wherein said mobile telephone is deactivated and said pager is activated in both said page mode and said sleep mode.
Claim 27
Dependent Claim
17 words
The page phone according to claims 17, wherein said pager is portable and incorporated into a wristwatch.
Claim 28
Dependent Claim
20 words
The page phone according to claim 17, wherein said activation means is a radio transmitter for generating low frequency signals.
Claim 29
Dependent Claim
18 words
The page phone according to claim 17, wherein each mobile telephone is associated with a unique identification number.
Claim 30
Dependent Claim
45 words
The page phone according to claim 17, wherein said pager includes: a receiver for receiving said page signals, and a control means, connected to said receiver, for generating an activation signal in said first mode and for generating an alert signal in a second mode.
Claim 31
Dependent Claim
39 words
The page phone according to claim 17, wherein in said first mode an incoming call to said mobile telephone is forwarded and then redirected to said mobile telephone a predetermined time period after said incoming call has been forwarded.
Claim 32
Dependent Claim
21 words
The page phone according to claim 11, wherein said forwarded call results in a page signal begin transmitted to said pager.
Claim 33
Dependent Claim
24 words
The page phone according to claim 11, wherein redirecting a call includes generating a cellular paging signal to be transmitted over a control channel.
References Cited (Backward Citations)
No citation records indexed.
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